Heat resisting seat for dampers



i atented June 12, I934 UNITED STATES PATENT OFFICE HEAT RESISTING SEAT FOR DAMPER-S Russell J. Williams, Chicago Heights, 111., as-

signor to American Manganese Steel Company, Chicago, 111., a corporation of Maine Application May 13, 1931, Serial No. 537,065

Claims. (01.126-285) This invention relates to damper seats. In the a tongue 24 of the horizontal top member 18 illustrated form it comprises a sectional metalis inserted into the socket 26 of the vertical memlic damper frame, the various sections of which ber 16. At the center the tongue 28 of the cenare connected by slip joints having suflicient play ter member is received in the socket 30 of the 5 to permit full expansion. When originally invertical member 16. Likewise the socket '32 at stalled shims of wood or other material destructhe bottom corners of the vertical member 16 is tible by heat are provided to properly space the formed to loosely receive the tongue 34 of the parts and to prevent the masons from bricking bottom member 22. When the frame has thus the frame in too tightly. The vertical members been assembled, a sunken seat for the reception 10 are keyed so that they may be secured rigidly in and sliding of the damper is bounded by the place without any expansion. shoulders 36 on the vertical members 16 and by Various objects are accomplished by this inventhe shoulder 38 on the bottom member 22. The tion. Buckling due to expansion by heat is endamper seats and slides on the vertical ledges tirely prevented as the parts are so constructed 46 and the bottom ledge 42, as well as on the face 15 and assembled that full expansion is prevented. of the central member 20 and the top member 7 Nevertheless the parts are laid in such a position 18. The tongues are preferably sufliciently snug that no movement is necessary except for exfitting, front and back, to prevent twisting of pansion of the particular part. In other words, the frame. no member is bodily thrust aside by the expansion Each of the members is provided with either 20 of another member. This permits a more secure a flange or a groove by which it is splined in its and permanent mounting of the various indiposition. Thus the vertical members have at vidual members. their under side the grooves 44. If desired, this With these and various other objects in view, may be so laid in the fire-resisting clay or other the invention may consist of certain novel features bonding material that the latter is swelled up into i of construction and operation, as will be more the groove 44 and splines the vertical members fully described and particularly pointed out in the against horizontal movement. The bottom memspecification, drawing and claims appended ber 22 is provided with a similar groove 46, and hereto. in Figure 1 this has been shown filled with the In the drawing, which illustrates an embodiclay packing 48. As the central member 20 and 30 ment of the device and wherein like reference the top member 18 do not have the depth to recharacters are used to designate like parts, ceive deep grooves, they may be provided with Figure 1 is a sectional view illustrating the flanges 50 and 52, respectively, as illustrated. damper seat as installed in the flue with the These splines do not in any case interfere with damper in closed position; the expansion of the members, as they extend 35 Figures 2, 3 and 4 are perspective views showlongitudinally and are uninterrupted in extent. ing the upper, middle and lower joints of the Thus, since only the lower half of the vertical frame, respectively; and member 16 is in the flue, the key formed of the Figure 5 is an elevation of the assembled frame clay or other binding material is located entirely or seat. within the groove 44 so that when the vertical 40 Although my invention may take many forms, member 16 expands, the portion thereof which only one has been chosen for illustration. The moves merely slides along the spline of the binddamper frame or seat 10 which is installed inthe ing material. In spite of the expansion, the flue 12 preferably at an inclination, as shown in spline remains intact and so the vertical member Figure 1, carries a damper 14 which may be of 16 continues to be held securely in its proper the metallic sectional type shown, though obvi position. Thebottom member 22 may be similarly 1 ously the damper seat may be used in other posiheld in place by groove 46. The central member tions, in other types of fines and with different 20 is keyed in place by its flange 50 which forms forms of dampers. a corresponding groove in the binding clay and The damper comprises the longitudinal vertiwhich extends longitudinally in said groove with- 50 i cal members 16, the top transverse or horizontal out so weakening it that the member 20 becomes member 18, the central or horizontal member 20 too loose. and the bottom member 22 all formed prefer- It should be borne in mind that the splining or ably of a heat resisting metal. Each of the joints the various members is not essential as they may between the partsisformed by aloose tongue and be sufliciently held in place in the ordinary socket construction. Thus in the upper corners manner, that is, merely by the contacting bricks.

When the frame is installed it is provided with the shims 54 of wood or other material destructible by heat, located in the positions shown. These shims not only aid the proper initial relative location of the parts of the damper, so as to allow for expansion, but more important still, they prevent the masons from crowding the parts together in the process of laying the brickwork. When the furnace is fired the wooden shims 54 very quickly burn away so that the proper amount of play is allowed for expansion of the metal. Thus, if the central member 20 is keyed in place, the shim below it and between it and the vertical members 16 will leave spaces which permit both the vertical expansion of the member 16 and the horizontal expansion of the member 20. If the central member 20 is not keyed it will rest on the bottom of the sockets 30 after the shim has been burned out and so the provision of the shim in that case would not be essential.

Although either the shims or the rigid mounting of the various members may be omitted, it is very desirable to include both features. By so doing a frame is provided in which all the parts are dependably retained in their proper positions and yet in which full expansion is permitted without any danger of buckling.

It is to be understood that many other embodiments of the invention, including some in improved form, will be apparent, and in the course of time more will be devised by those skilled in the art. It is not desired that this invention be limited to the details described, for its scope includes all such forms or improvements as come Within the spirit of the following claims, construed as broadly as the prior art will permit.

What is claimed is:

1. In combination with a flue, a damper seat comprising a plurality of sections fitted together with sufiicient play therebetween to permit customary maximum expansion, and means splining some of said sections to said flue against transverse movement.

2. In combination with a flue, a damper seat comprising a plurality of sections fitted together with suflicient play therebetween to permit customary maximum expansion, and means splining some of said sections to said flue against transverse movement, said means being so construcled as to permit longitudinal movement of said sections.

' 3. In combination with a flue, a damper seat comprising a plurality of sections fitted together with sufficien-t play therebetween to permit cusiomary maximum expansion, means for splining some of the sections in said flue in position, said means being substantially unaffected by longitudinal expansion of the sections, and heat destructible shims for maintaining the proper spacing of the parts during installation.

' 4. In combination with a flue, a damper seat comprising a plurality of sections fitted together with sufheient play therebetween to permit customary expansion, means splining some of said sections to said flue against transverse movement, said means being substantially unaffected by longitudinal movement, and heat destructible shims for maintaining the proper spacing of the sections during installation.

5. In combination with a flue, a damper seat comprising a plurality of heat resisting metallic sections fitted together with sufficient play therebetween to permit customary expansion, means splining some of said sections to said flue against transverse movement, said means being substantially unaffected by longitudinal movement, and heat destructible shims for maintaining the proper spacing of the sections during installation.

RUSSELL J. WILLIAMS. 

